React
A JavaScript library for building user interfaces with reusable components. Created by Meta, powers Facebook, Instagram, and thousands of apps.
What is React?
React is a JavaScript library for building user interfaces with reusable components.
Instead of writing one giant app, you break your UI into small pieces (components) that manage their own state and can be reused anywhere. React handles updating the DOM efficiently when your data changes.
Most modern web apps use React because it makes complex UIs manageable. You can start with Create React App or jump straight to Next.js for a full framework. The ecosystem is massive with solutions for routing, state management, and pretty much anything you need.
Free and open source. Over 220,000 stars on GitHub. Learning curve is real but worth it if you're building anything beyond a landing page.
Good to Know
Component-based architecture lets you build UIs from reusable pieces
Virtual DOM makes updates fast by only changing what actually changed
Created and maintained by Meta (Facebook), used in production by thousands of companies
Works with frameworks like Next.js, Remix, and Gatsby for full-stack apps
Hooks let you use state and other features without writing class components
How Vibe Coders Use React
Building a dashboard where different sections update independently
Creating a design system with buttons, forms, and cards you use across your entire app
Prototyping a new feature quickly by combining existing components
Building a mobile app with React Native using the same component logic
Frequently Asked Questions
Related Terms
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